Colloidal quantum dot random laser
Colloidal quantum dot random laser
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DOI：
10.1364/oe.19.002996
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发表时间：
2011-02-14
期刊：
影响因子：
3.8
通讯作者：
Dawson, Martin D.
中科院分区：
文献类型：
--
作者：
Chen, Yujie;Herrnsdorf, Johannes;Dawson, Martin D.
我们报道了一个由胶体量子点(CQD)提供光学放大的系统中的随机激光作用。该体系是通过在玻璃衬底表面沉积出微米级的粗糙沟槽，从溶液中沉积出CdSe/ZnS核壳量子点得到的。CQD随机堆积和玻璃凹槽中无序结构的结合使增益和多次散射成为可能。在光激励下，在超过25mJ/cm(2)阈值的情况下，在系统中触发随机激光作用。记录了单次激发光谱，研究了激光的发射光谱特性，结果表明激光模式位置的稳定性和接近材料增益最大值的模式的优势。(C)2011年美国光学学会
We report random laser action in a system where optical amplification is provided by colloidal quantum dots (CQDs). This system is obtained by depositing from solution CdSe/ZnS core-shell CQDs into rough micron-scale grooves fabricated on the surface of a glass substrate. The combination of CQD random packing and of disordered structures in the glass groove enables gain and multiple scattering. Upon optical excitation, random laser action is triggered in the system above a 25-mJ/cm(2) threshold. Single-shot spectra were recorded to study the emission spectral characteristics and the results show the stability of the laser mode positions and the dominance of the modes close to the material gain maximum. (C) 2011 Optical Society of America